I can't teach you how to bounce a ball over a creek, but anybody can learn to play from an uphill lie in a fairway bunker. There are four keys to this specialty shot.
1. Position the ball a little closer to the target-side foot.
2. At address, stand with your shoulders and hips parallel to the slope of the bunker (A). Avoid the common error of leaning toward the target on an uphill lie. Doing so delofts the club and increases your chance of driving the ball into the wall of the bunker.
3. While swinging, keep the lower body quiet and the majority of your weight on your rear foot. Hit the shot primarily with your arms and shoulders. Notice that after hitting his fairway bunker shot to the 17th green (B), Chris Smith had transferred very little of his weight, and that his right foot was still grounded.
4. Pick the ball cleanly off the sand, unlike on a greenside bunker shot, in which the club enters the sand well behind the ball.